Financing Arrangements and Fair Value of Financial Instruments (Details Textual) - USD ($)		1 Months Ended	3 Months Ended			6 Months Ended
	May 12, 2016	Feb. 29, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	May 31, 2016	Dec. 31, 2015	Sep. 30, 2010
Debt Instrument [Line Items]
Senior Notes			$ 161,321,000			$ 161,321,000			$ 172,497,000
Purchase of senior notes						9,206,000	$ 0
Gain (loss) on extinguishment of debt			0		$ 0	1,894,000	0
Revolving credit facility			0			0			0
ABL Facility			0			0			0
Short-term debt			10,193,000			10,193,000			7,382,000
Letters of credit outstanding, amount			14,900,000			14,900,000
Restricted cash and cash equivalents, current			16,500,000			16,500,000
Other current assets
Debt Instrument [Line Items]
Restricted cash and cash equivalents, current			17,400,000			17,400,000
Foreign operations
Debt Instrument [Line Items]
Short-term debt			10,200,000			10,200,000			7,400,000
Letters of credit outstanding, amount			10,200,000			10,200,000
Restricted cash and cash equivalents, current			900,000			900,000
Credit agreement | Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 200,000,000.0		$ 200,000,000.0		150,000,000.0
Revolving credit facility								$ 0
Interest costs incurred			1,100,000
ABL facility | Federal funds rate
Debt Instrument [Line Items]
Debt instrument, base rate, basis spread on variable rate	0.50%
ABL facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, base rate, basis spread on variable rate	1.00%
Debt instrument, basis spread on variable rate	3.50%
ABL facility | Base rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.50%
ABL facility | Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity								90,000,000.0
Line of credit facility, remaining borrowing capacity			50,600,000			$ 50,600,000
Line of credit facility, unused capacity, commitment fee percentage						0.625%
Line of credit facility, covenant terms, acceleration of other indebtedness	$ 25,000,000
Senior notes
Debt Instrument [Line Items]
Debt instrument, face amount										$ 172,500,000.0
Senior Notes			$ 161,300,000			$ 161,300,000
Debt instrument, interest rate, stated percentage			4.00%			4.00%
Debt conversion converted instrument shares issued for basis principal						90.8893
Debt conversion principal amount of senior notes as basis for conversion rate						$ 1,000
Debt instrument, convertible, conversion price (in dollars per share)			$ 11			$ 11
Debt instrument, fair value disclosure			$ 153,800,000			$ 153,800,000			$ 154,400,000
Senior notes | Share repurchase program
Debt Instrument [Line Items]
Debt instrument, repurchased face amount		$ 11,200,000		$ 11,200,000
Purchase of senior notes		$ 9,200,000		9,200,000
Gain (loss) on extinguishment of debt				$ 1,900,000
Minimum | ABL facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.25%
Minimum | ABL facility | Base rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.25%
Minimum | ABL facility | Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.375%
Maximum | ABL facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.50%
Maximum | ABL facility | Base rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.50%
Maximum | ABL facility | Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity								$ 150,000,000.0
Line of credit facility, unused capacity, commitment fee percentage	0.625%